816 results — topic: Alpine & Subalpine Ecology
Bedrock weathering rates, reactive nitrogen influxes and effluxes, and nitrous oxide emissions rates from the Pumphouse Hillslope, East River Watershed, Colorado.
Atmospheric nitrous oxide contributes directly to global warming, yet models of the nitrogen cycle do not account for bedrock, the largest pool of terrestrial nitrogen, as a source of nitrous oxide. Although it is known that release rates of nitrogen from bedrock are large, there is an incomplete un
River and hyporheic zone water geochemical data from OsmoSamplers, East River Pumphouse, Colorado, Nov 2017-Sept 2018
This data package contains geochemical and river water temperature data from OsmoSamplers deployed at East River, Colorado pump house. There are three data files. The first one contains sulfate (SO4) and chloride (Cl) concentrations from riverwater and hyporheic zone (sediment water interface (SWI),
Temperature and floral density data from seven study sites around the Rocky Mountain Biological Laboratory, Colorado: 2013-2021
Data were collected as part of a study of population dynamics of solitary, cavity-nesting Hymenoptera. Nesting structures (“trap-nests”) were established at five study sites along an elevational gradient around the Rocky Mountain Biological Laboratory in 2013. Two additional study sites were added i
Valve Ultrastructure and Description of a new Luticola D. G. Mann (Bacillariophyceae) species from Colorado, USA
This dataset contains the digitized treatments in Plazi based on the original journal article Shea, Rachel, Greifenstein, Jeremy, Kociolek, J. P. (2022): Valve Ultrastructure and Description of a new Luticola D. G. Mann (Bacillariophyceae) species from Colorado, USA. Phytotaxa 554 (3): 269-277, DOI:
Leaf gas exchange in Ipomopsis aggregata under manipulated snowmelt timing and summer precipitation
Vegetative traits of plants can respond directly to changes in the environment, such as those occurring under climate change. That phenotypic plasticity could be adaptive, maladaptive, or neutral. We manipulated the timing of spring snowmelt and amount of summer precipitation in factorial combinatio
A meteorology and snow dataset from adjacent forested and meadow sites at Crested Butte, CO, USA
This dataset contains meteorology and snow observation data collected at sites in the southwestern Colorado Rocky Mountains during water years 2019-2021. Data collection had an emphasis on paired open-forest sites and included three forested elevations. In total, we present 270 snow pit observations
Data from: Comparative impacts of long-term trends in snowmelt and species interactions on plant population dynamics
Climate change can impact plant fitness and population persistence directly through changing abiotic conditions and indirectly through its effects on species interactions. Pollination and seed predation are important biotic interactions that can impact plant fitness, but their impact on population g
Effects of climate change on mast-flowering cues in a clonal montane herb, <i>Veratrum tenuipetalum</i> (Melanthiaceae)
• Premise of the study: Climate change threatens to alter the timing and magnitude of abiotic cues that synchronize mast flowering, such as temperature and precipitation. Climate change may therefore alter the frequency of masting, in turn affecting species in the community that use pulsed resources
Food, refuge or both? The influence of moss on grazer assemblages in high altitude streams
The structure and function of subalpine ecosystems in the face of climate change
Subalpine ecosystems are experiencing rapid changes in snow pack, temperature, and precipitation regime as a result of anthropogenic climate forcing. These changes in climate can have a profound effect on subalpine ecosystem structure and functioning, which may ultimately feed back to climate change
Effects of floral diversity and density on fly (<i>Diptera:Bombyliidae and Syrphidae</i>) floral foraging fidelity in subalpine meadows
Foraging behavior of pollinators is an extensively researched topic. Research on bee, butterfly, and hummingbird foraging behavior has led to a greater understanding of the impacts of plant community composition on foraging behavior. This research has been further enhanced by fly foraging behavior a
Assessing the impacts of long-term pan trapping on native bee populations in sub-alpine ecosystems
Pollination by native bees is an essential ecosystem service in both natural and agricultural systems. During the last several decades, there have been reported declines in native bee populations worldwide. Due to recent declines, there is an increasing need for standardized population monitoring pr
Understanding the importance of coniferous understory versus open meadows for bees in times of drought
Real and experimental ecosystem warming: interacting effects on snowmelt, plant community composition and carbon storage in a Rocky Mountain subalpine meadow
A 22 year warming experiment at Rocky Mountain Biological Laboratory has elucidated short term (15 year) responses in plant community and soil organic carbon to artificial warming. This summer’s research evaluates long-term (>15 year) changes and, because of recent climate change effects, the releva
How do above and belowground grass-fungus symbioses change over elevational gradients in mountainous Colorado?
Plants and fungi are closely associated and likely have been since terrestrial ecosystems were first inhabited. These symbiotic relationships have taken two main forms: internal aboveground symbionts known as endophytes, and belowground root associated fungi, the most common of which are mycorrhizal
Does nutrient enrichment interact with <i>Castilleja miniata</i> to alter plant communities in montane meadows?
Many studies have demonstrated the negative effects of hemiparasites on host performance, such as decreased host biomass and reproductive capabilities. Much less work, however, has examined the role of hemiparasites in shaping plant community structure, though it has been proposed that the effect of
Syrphid fly distributions along an elevation gradient in and around the Rocky Mountain Biological Laboratory (RMBL)
Much is known about bee pollination, but there is little information concerning pollination by syrphid flies. Syrphid flies are also important to study because they are the most significant flower visiting Dipteran insects, which are the second most important order among flower-visiting and flower-p
Parasite infection and host dynamics in a naturally fluctuating rodent population
Parasites can both influence and be affected by host population dynamics, and a growing number of case studies support a role for parasites in causing or amplifying host population cycles. In this study, we examined individual and population predictors of gastrointestinal parasitism on wild cyclic m
Social attributes and associated performance measures in marmots: bigger male bullies and weakly affiliating females have higher annual reproductive success
The utility of considering multiple dimensions when measuring the structure and functional consequences of social behavior is highlighted, and the relationship between an individual’s social attributes and several performance measures is examined.
